Hai eveyone I had several problems in my life since 18yrs.now I'm 25yrs.recently I had severe depression continuosly for 1week.after I recovered somewhat from that my eye has sight blurred.I have already a power of -4.25D.how is depression related to eye power?

Directly no, but often physcial problems show up more when we are both physcially and mentally down.

I think this would be more fitting in the health section, but I will leave it here for a while to see if it'll get some responses here. I know a lot about eyes, and nothing about depression.

Medication could also alter prescriptions but like fr_chuck said the human body is a strange thing and psycological issues can often manefest into physical symptoms if I were you id get them checked again just to make sure